Your in crack
Cheaper to add wireless zones to house 20m doesn't mean anything , may I suggest you read your requests lol and don't be sensitive not trying to be smarty lol
Ok fair enough fraggle , so your not interested in adding a wireless zones to the garage which maybe cheaper on longer run, if system is maintained as you say will be not much more expensive on service
If the panel supports line fail to a programmed output or has pins you could have a gsm module that will also ping you that line has failed but it will ping every time
Think about costs , if you paid a monitoring company to do all this they would notify you anyway
But there are monthly costs from that way some cheap some expensive
It maybe your a enthusiastic diyer then I recommend you just do what your doing
Problem will be in finding a cheap enough contract SIM like max £5 per month unlimited sms
Ps James I reckon is pointing to having a monitoring station and maintainer
Just try one at a time the dialler can call you direct if you programme your number in phone number one as an example
Or just try the open tap details to send you an SMS via there site but leave your number out if that's what you want
I still think if you want just a general sms keep the dialler as a dialling unit and get another game unit to send the SMS it will be cheaper than open tap
There are some units that will dial and SMS and will choose depending on what is available ie if you had a line fail the SMS would send or vice versa
Don't make sense because it's not compulsory to have home insurance to have a supply of any kind
Therefore you are able to make a claim against anyone independently
If it doesn't work then open case , but I reckon your doing something wrong
Try doing it via https://www.open-telecom.co.uk/products-services/opentap-to-mobile-text-sms-and-email-messaging-gateway/
Expensive tho
Well then use the maintained tap service , but it's expensive not worth it for a general txt
Your better off using outputs and connecting to a gsm dialler and get a contract SIM that you don't have to top up, just have an SMS max
Then keep the phone dialer aswell